EN ISO 16120-4:2011

SLOVENSKI STANDARD
01-november-2011
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SIST EN 10016-4:1997
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Non-alloy steel wire rod for conversion to wire - Part 4: Specific requirements for wire rod
for special applications (ISO 16120-4:2011)
Walzdraht aus unlegiertem Stahl zum Ziehen - Teil 4: Besondere Anforderungen an
Walzdraht für Sonderanwendungen (ISO 16120-4:2011)
Fil-machine en acier non allié destiné à la fabrication de fils - Partie 4: Exigences
spécifiques au fil-machine pour applications spéciales (ISO 16120-4:2011)
Ta slovenski standard je istoveten z: EN ISO 16120-4:2011
ICS:
77.140.65 Jeklene žice, jeklene vrvi in Steel wire, wire ropes and
verige link chains
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 16120-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2011
ICS 77.140.60 Supersedes EN 10016-4:1994
English Version
Non-alloy steel wire rod for conversion to wire - Part 4: Specific
requirements for wire rod for special applications (ISO 16120-
4:2011)
Fil-machine en acier non allié destiné à la fabrication de fils Walzdraht aus unlegiertem Stahl zum Ziehen - Teil 4:
- Partie 4: Exigences spécifiques au fil-machine pour Besondere Anforderungen an Walzdraht für
applications spéciales (ISO 16120-4:2011) Sonderanwendungen (ISO 16120-4:2011)
This European Standard was approved by CEN on 30 June 2011.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16120-4:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 16120-4:2011) has been prepared by Technical Committee ISO/TC 17 "Steel" in
collaboration with Technical Committee ECISS/TC 106 “Wire rod and wires” the secretariat of which is held by
AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2012, and conflicting national standards shall be withdrawn at
the latest by January 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 10016-4:1994.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 16120-4:2011 has been approved by CEN as a EN ISO 16120-4:2011 without any
modification.
INTERNATIONAL ISO
STANDARD 16120-4
Second edition
2011-07-01
Non-alloy steel wire rod for conversion to
wire —
Part 4:
Specific requirements for wire rod for
special applications
Fil-machine en acier non allié destiné à la fabrication de fils —
Partie 4: Exigences spécifiques au fil-machine pour applications
spéciales
Reference number
ISO 16120-4:2011(E)
©
ISO 2011
ISO 16120-4:2011(E)
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 16120-4:2011(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Designation .2
4 Requirements.2
4.1 General .2
4.2 Chemical composition and mechanical properties .2
4.3 Internal soundness and surface quality.4
4.4 Depth of surface discontinuities.4
4.5 Depth of decarburization .4
4.6 Non-metallic inclusions .5
4.7 Core segregation .5
4.8 Tensile strength.6
4.9 Scale characteristics.6
4.10 Mechanical damage.6
4.11 Microstructure .6
Annex A (informative) Steel designations in accordance with ISO 16120-4 and designation of
comparable steel grades in national or regional standards .7
Bibliography.9

ISO 16120-4:2011(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16120-4 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 17, Steel wire rod
and wire products.
This second edition cancels and replaces the first edition (ISO 16120-4:2001), which has been technically
revised.
ISO 16120 consists of the following parts, under the general title Non-alloy steel wire rod for conversion to
wire:
⎯ Part 1: General requirements
⎯ Part 2: Specific requirements for general-purpose wire rod
⎯ Part 3: Specific requirements for rimmed and rimmed substitute, low-carbon steel wire rod
⎯ Part 4: Specific requirements for wire rod for special applications

iv © ISO 2011 – All rights reserved

INTERNATIONAL STANDARD ISO 16120-4:2011(E)

Non-alloy steel wire rod for conversion to wire —
Part 4:
Specific requirements for wire rod for special applications
1 Scope
This part of ISO 16120 is applicable to steel wire rod with improved characteristics intended for drawing and/or
cold rolling.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 4948-1, Steels — Classification — Part 1: Classification of steels into unalloyed and alloy steels based on
chemical composition
ISO 4948-2, Steels — Classification — Part 2: Classification of unalloyed and alloy steels according to main
quality classes and main property or application characteristics
ISO/TS 4949, Steel names based on letter symbols
ISO 4967, Steel — Determination of content of nonmetallic inclusions — Micrographic method using standard
diagrams
ISO 16120-1:2011, Non-alloy steel wire rod for conversion to wire — Part 1: General requirements
ISO 16120-2:2011, Non-alloy steel wire rod for conversion to wire — Part 2: Specific requirements for
general-purpose wire rod
ASTM E45, Standard Test Methods for Determining the Inclusion Content of Steel
ISO 16120-4:2011(E)
3 Designation
In the designation C##D2, “C” means non-alloy steel (see ISO/TS 4949); ## is the indicative average content
of carbon;. “D” signifies that it is for wire-drawing; “2” means wire rod for special applications.
If steels are ordered according to the chemical composition, ## means that values are to be inserted by the
purchaser according to the steel names as designated in Table 1, first column.
Steels can also be ordered according to tensile strength. The mid-point of the required ultimate tensile
strength (UTS) range shall be indicated as a suffix to the grade designation, e.g. C##D2 – 1020, where the
required mid-point of the UTS is 1 020 MPa. “##” means “to be left blank” since the carbon content is at the
discretion of the supplying mill, and the supplying mill indicates the exact number of ## based on the grade
designation until shipment. See Table 1 of ISO 16120-2:2011 for the grade designation.
4 Requirements
4.1 General
For the general requirements, see ISO 16120-1.
4.2 Chemical composition and mechanical properties
For heat analysis, the values shown in Table 1 shall apply. If product analysis is required, the permissible
deviations of the product analysis relative to the specified value of the heat analysis are given in Table 2.
2 © ISO 2011 – All rights reserved

ISO 16120-4:2011(E)
a
Table 1 — Chemical analysis (heat analysis)
Heat analysis
c d,j e f f f,g h i
Steel C Si Mn P S Cr Ni Mo Cu Al N

b
grade
max. max. max. max. max. max. max. max.
% % % % % % % % % % %
C3D2 ≤0,05 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C5D2 ≤0,07 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C8D2 0,06 - 0,10 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C10D2 0,08 - 0,12 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C12D2 0,10 - 0,14 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C15D2 0,13 - 0,17 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C18D2 0,16 - 0,20 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C20D2 0,18 - 0,23 ≤0,30 0,30 - 0,50 0,020 0,025 0,10 0,10 0,05 0,15 0,01 0,007
C26D2 0,2
...